diff options
Diffstat (limited to 'system/core')
| -rw-r--r-- | system/core/Output.php | 95 |
1 files changed, 82 insertions, 13 deletions
diff --git a/system/core/Output.php b/system/core/Output.php index 0ba0a5743..2793d4132 100644 --- a/system/core/Output.php +++ b/system/core/Output.php @@ -728,13 +728,13 @@ class CI_Output { preg_match_all('{<style.+</style>}msU', $output, $style_clean); foreach ($style_clean[0] as $s) { - $output = str_replace($s, $this->minify($s, 'text/css'), $output); + $output = str_replace($s, $this->_minify_script_style($s, TRUE), $output); } // Minify the javascript in <script> tags. foreach ($javascript_clean[0] as $s) { - $javascript_mini[] = $this->minify($s, 'text/javascript'); + $javascript_mini[] = $this->_minify_script_style($s, TRUE); } // Replace multiple spaces with a single space. @@ -782,22 +782,91 @@ class CI_Output { case 'text/css': case 'text/javascript': - //Remove CSS comments - $output = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $output); + $output = $this->_minify_script_style($output); - // Remove spaces around curly brackets, colons, - // semi-colons, parenthesis, commas - $output = preg_replace('!\s*(:|;|,|}|{|\(|\))\s*!', '$1', $output); + break; - // Remove spaces - $output = preg_replace('/ /s', ' ', $output); + default: break; + } + + return $output; + } - // Remove breaklines and tabs - $output = preg_replace('/[\r\n\t]/', '', $output); - break; + // -------------------------------------------------------------------- - default: break; + /** + * Minify Style and Script + * + * Reduce excessive size of CSS/JavaScript content. To remove spaces this + * script walks the string as an array and determines if the pointer is inside + * a string created by single quotes or double quotes. spaces inside those + * strings are not stripped. Opening and closing tags are severed from + * the string initially and saved without stripping whitespace to preserve + * the tags and any associated properties if tags are present + * + * @param string $output Output to minify + * @param bool $has_tags specify if the output has style or script tags + * @return string Minified output + */ + protected function _minify_script_style($output, $has_tags = FALSE) + { + // We only need this if there are tags in the file + if ($has_tags === TRUE) + { + // Remove opening tag and save for later + $pos = strpos($output, '>'); + $open_tag = substr($output, 0, $pos); + $output = substr_replace($output, '', 0, $pos); + + // Remove closing tag and save it for later + $end_pos = strlen($output); + $pos = strpos($output, '</'); + $closing_tag = substr($output, $pos, $end_pos); + $output = substr_replace($output, '', $pos); + } + + // Remove CSS comments + $output = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $output); + + // Remove spaces around curly brackets, colons, + // semi-colons, parenthesis, commas + $output = preg_replace('!\s*(:|;|,|}|{|\(|\))\s*!', '$1', $output); + + // Remove spaces + $in_string = FALSE; + $in_dstring = FALSE; + $array_output = str_split($output); + foreach ($array_output as $key => $value) + { + if ($in_string === FALSE && $in_dstring === FALSE) + { + if ($value === ' ') + { + unset($array_output[$key]); + } + } + + if ($value === "'") + { + $in_string = ! $in_string; + } + + if ($value === '"') + { + $in_dstring = ! $in_dstring; + } + } + + $output = implode($array_output); + + // Remove breaklines and tabs + $output = preg_replace('/[\r\n\t]/', '', $output); + + // Put the opening and closing tags back if applicable + if (isset($open_tag)) + { + $output = $open_tag.$output.$closing_tag; } return $output; |